Air purifier



FIG. 1 is a front perspective view of an air purifier showing my new design according to a first embodiment;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front perspective view of an air purifier showing my new design according to a second embodiment;

FIG. 10 is a rear perspective view of FIG. 9;

FIG. 11 is a front elevational view of FIG. 9;

FIG. 12 is a rear elevational view of FIG. 9;

FIG. 13 is a left side elevational view of FIG. 9;

FIG. 14 is a right side elevational view of FIG. 9;

FIG. 15 is a top plan view of FIG. 9; and,

FIG. 16 is a bottom plan view of FIG. 9.

The broken lines in the drawings illustrate the portions of the air purifier which form no part of the claimed design. 

CLAIM The ornamental design for an air purifier, as shown and described. 